A significant global marine sanctuary spanning 247,000 square miles around the Chagos Islands will permit limited fishing activities for the first time since 2010, following the UK’s agreement to transfer sovereignty to Mauritius. This decision aims to facilitate the return of the Chagossian people, who were historically displaced and depended on fishing as their primary economic activity. The move has sparked considerable concern among environmental organizations worried about disrupting one of Earth’s most pristine ecosystems.
The marine protected area, established as a no-take zone over a decade ago, has become a global benchmark for ocean conservation success. The waters harbor extraordinary biodiversity, including over 800 fish species, more than 50 shark varieties, sea turtles, and rays. Additionally, approximately 175,000 seabird pairs breed on the islands annually. The region supports 76 species classified as threatened by conservation authorities, making its ecological significance unparalleled.
The proposed arrangement permits what authorities describe as sustainable and artisanal fishing across nearly 99 percent of the protected zone, with only the area surrounding the Diego Garcia military base remaining off-limits to fishing vessels. Chagossian representatives argue that allowing regulated fishing honors cultural heritage and livelihood rights. Richard Ally from Chagossian Voices emphasized that preventing the community from fishing would undermine genuine resettlement, while stressing that Chagossians have historically acted as environmental stewards rather than exploitative fishers.
Conservation experts sharply dispute this optimistic assessment. Dr. Enric Sala, leading the National Geographic Society’s Pristine Seas initiative, warns that opening the zone threatens its unique ecological functions. He describes Chagos waters as a productive “fish bank,” where migratory species such as tuna reproduce and disperse to other ocean regions. Removing complete protection status risks dismantling these critical biological processes that benefit marine ecosystems far beyond the archipelago.
Enforcement challenges compound environmental worries. Though Mauritius pledges to prohibit commercial fishing, skeptics question whether adequate capacity exists to monitor and enforce regulations. Emily Thornberry, chair of parliament’s Foreign Office committee, advocates for legally binding no-take provisions rather than relying on government goodwill. Heather Koldewey from the Zoological Society of London acknowledges these concerns while expressing confidence in Mauritius’s conservation commitment and pledging ongoing collaborative support with authorities.
